ccstruct/quadratc.h

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#ifndef           QUADRATC_H
#define           QUADRATC_H

#include          "points.h"

class QUAD_COEFFS
{
  public:
    QUAD_COEFFS() { 
    }                            //empty constructor
    QUAD_COEFFS(             //constructor
                double xsq,  //coefficients
                float x,
                float constant) {
      a = xsq;
      b = x;
      c = constant;
    }

    float y(                  //evaluate
            float x) const {  //at x
      return (float) ((a * x + b) * x + c);
    }

    void move(               // reposition word
              ICOORD vec) {  // by vector
      INT16 p = vec.x ();
      INT16 q = vec.y ();

      c = (float) (c - b * p + a * p * p + q);
      b = (float) (b - 2 * a * p);
    }

    double a;                    //x squared
    float b;                     //x
    float c;                     //constant
  private:
};
#endif

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